I thought that if I ordered a book from a particular person, that the "order" when to them. For some reason, after I ordered one book so I could have a 2 for 1 deal, I got the book from another member and have no idea how this happened. I know I was on this person's booklist when I ordered. . .

Right, if you are browsing someone's bookshelf and order right away it will be ordered from that person. But, if you sidetrack and look at the book description and order from that it will order from the FIFO line and the order will go to the first person.

To make sure you order from the right person, if you go to a book description open it in a new window! Also, as you are doing the ordering, pick order more from this member and make sure the name matches the name of the person you want to order from!